#include<bits/stdc++.h>
using namespace std;
#define int long long
signed main() {
	int x, y;
	cin >> x >> y;
	cout << 100 * 100 / 2 - (100 - x) * (100 - y) / 2 - (100 - x + 100) * y / 2;
	return 0;
}
